Received: 23 May 2018
Accepted: 12 June 2019
First Online: 21 June 2019
Ethics approval and consent to participate
: Included in the manuscript.An approval was taken from the institutional review board (IRB) before starting the study <i>(ref no: MGIMS/IEC/MED/46/2017 dated 8th June 2017).</i> Informed consent was taken from the residents before inclusion in the study.
: The authors declare that they have no competing interests.